期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 47, 期 39, 页码 17224-17232出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2022.03.229
关键词
Fe-N-C catalysts; Oxygen reduction reaction; MXene; Electronic interaction; Metal-organic framework
资金
- HKUST Fund of Foshan [FSUST19-FYTRI06]
- Guangdong-Hong Kong-Macao Joint Laboratory [2019B121205001]
In this study, a Ti3C2 MXene supported metal-organic framework derived Fe-N-C catalyst was proposed to simultaneously address the issues of insufficient active sites, low conductivity, and poor durability, and exhibited superb ORR activity and long-term stability in both alkaline and acidic electrolytes.
Iron-nitrogen-carbon (Fe-N-C) electrocatalysts offer great promise to replace their noble metal-based counterparts for oxygen reduction reactions (ORR). However, the practical applications of this type of catalyst are hindered by insufficient accessible active sies, low electrical conductivity, and poor durability. Here, we report a Ti3C2 MXene supported metal-organic framework (MOF)-derived Fe-N-C (Fe-Nx/N/Ti3C2) catalyst to simultaneously address the issues. Owing to the negatively charged characteristics, NH2-MIL53(Fe) is firmly anchored on Ti3C2 MXene, which not only serves as a conductive substrate to alleviate the collapse and agglomeration of MOFs during the pyrolysis, but also modulates the electronic properties of active FeNx sites to improve the electrocatalytic activity and stability. As a result, the as-prepared Fe-Nx/N/Ti3C2 catalyst exhibits superb ORR activity and long-term stability in both alkaline and acidic electrolytes. (c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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